On Tue 24-09-19 08:46:48, Mircea CIRJALIU - MELIU wrote: > Having CONFIG_MEMCG turned off causes these issues: > mm/slub.o: In function `slab_pre_alloc_hook': > /home/mircea/build/mm/slab.h:425: undefined reference to `memcg_kmem_get_cache' > mm/slub.o: In function `slab_post_alloc_hook': > /home/mircea/build/mm/slab.h:444: undefined reference to `memcg_kmem_put_cache' You should be adding your Sign-off-by to every patch you post to the kernel mailing list (see Documentation/SubmittingPatches). It is also really important to mention which tree does this apply to and ideally also note which change has broken the code. In this particular case I have tried the current Linus tree (4c07e2ddab5b) and $ grep 'CONFIG_SLUB\|CONFIG_MEMCG' .config # CONFIG_MEMCG is not set CONFIG_SLUB_DEBUG=y CONFIG_SLUB=y CONFIG_SLUB_CPU_PARTIAL=y # CONFIG_SLUB_DEBUG_ON is not set # CONFIG_SLUB_STATS is not set which means CONFIG_MEMCG_KMEM is not enabled as well. And the compilation succeeds. What is your config file? -- Michal Hocko SUSE Labs
